Employee Benefit Plans - Schedule of Allocation of Plan Assets (Details)	Dec. 31, 2023
Equity
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	61.00%
Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	85.00%
U.S. Large
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	19.00%
U.S. Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
U.S. Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
U.S. Small/Mid
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
U.S. Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
U.S. Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
International Large
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	13.00%
International Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
International Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
International Small/Mid
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	3.00%
International Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
International Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	6.00%
Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Private Equity
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Private Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Private Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	39.00%
Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	70.00%
Public U.S. Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
Public U.S. Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Public U.S. Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	60.00%
Private Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	9.00%
Private Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Private Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Other | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Other | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Cash Equivalents | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Cash Equivalents | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. | Equity
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	61.00%
American Airlines, Inc. | Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
American Airlines, Inc. | Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	85.00%
American Airlines, Inc. | U.S. Large
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	19.00%
American Airlines, Inc. | U.S. Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | U.S. Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
American Airlines, Inc. | U.S. Small/Mid
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | U.S. Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | U.S. Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | International Large
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	13.00%
American Airlines, Inc. | International Large | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | International Large | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
American Airlines, Inc. | International Small/Mid
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	3.00%
American Airlines, Inc. | International Small/Mid | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | International Small/Mid | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	6.00%
American Airlines, Inc. | Emerging Markets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Emerging Markets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Private Equity | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | Private Equity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
American Airlines, Inc. | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	39.00%
American Airlines, Inc. | Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	70.00%
American Airlines, Inc. | Public U.S. Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
American Airlines, Inc. | Public U.S. Fixed Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. | Public U.S. Fixed Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	60.00%
American Airlines, Inc. | Private Income
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	9.00%
American Airlines, Inc. | Private Income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Private Income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. | Other
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Other | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Other | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. | Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Cash Equivalents | Minimum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. | Cash Equivalents | Maximum
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%